2-14 COACH EXTERIOR
PA1628 H3-41, H3-45 Operator’s Manual
TRAILER HITCH
18487
WARNING
The draw bar and the ball used for towing
the trailer should be rated for 20,000 lb
capacity or more.
CAUTION
The minimum requirement for a trailer
weighing up to 20,000 lb when coupled to
a 20,000 lb Prevost Trailer Hitch is as per
the following :
Trailer must comply with Federal Motor
Carrier Safety Regulations 393.52 regarding
trailer breaking capability.
The trailer coupling attachments meet the
following minimum static test load
requirements :
Longitudinal tension and compression: (1.5
x GVWR of trailer)
Transverse thrust : (0.5 x GVWR of trailer)
Vertical tension and compression: (0.5 x
GVWR of trailer)
Loads indicated must be applied without
incurring loss of attachments or distortion
or failure which could affect the safe
towing of trailer.
The ball and trailer coupling should meet
the following minimum test load
requirements without incurring failure :
Longitudinal tension and compression :
(Gross Trailer Weight of trailer x 3)
Transverse thrust : (Gross Trailer Weight of
trailer x 1)
Vertical tension and compression : (Gross
Trailer Weight of trailer x 1.3)
In this case, failure is identified as the point
at which the coupling or ball will accept no
additional test load without separation of
the ball from the coupling ball socket, or
the occurrence of a metal fracture of either
coupling ball or coupling assembly, which
results in separation of the ball from the
coupling ball socket.
Two lengths of safety chain shall be used.
The strength rating (minimum breaking
force) of each individual chain and its
connecting means shall be equal to, or
exceed the trailer GVWR.
Towing vehicle must be equipped with
engine or transmission retarder. The engine
or the transmission retarder on the vehicle
must be functional at all time (to be
inspected frequently).
Summary of Contents for H 2018 Series
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